AATSR/ ATSR-2

Advanced Along-Track Scanning Radiometer (same as ATSR-2)

Satellites

ERS-1 (ATSR), ERS-2 (ATSR-2) and Envisat (AATSR)

Status

Operational – Utilised in the period 1991 to ~ 2013

Mission

Multi-purpose VIS/IR imagery, with emphasis on very accurate sea surface temperature for climate

Instrument type

7-channel VIS/IR radiometer with dual view for accurate atmospheric corrections (4 channels on ERS-1)

Scanning technique

Conical oblique (cross-nadir and 47° fore); 2000 pixel of 1 km ssp; swath 500 km; scan rate 400 rpm

Coverage/cycle

Global coverage in 3 days (IR) or 6 days (VIS)

Resolution (s.s.p.)

1 km IFOV

Resources

Mass: 101 kg  -  Power: 100 W  -  Data rate: 625 kbps

Central wavelength

Bandwidth

Radiometric accuracy (NEΔT or SNR)

550 nm (not on ERS-1 ATSR)

20 nm

20 @ 0.5 % albedo

659 nm (not on ERS-1 ATSR)

20 nm

20 @ 0.5 % albedo

865 nm (not on ERS-1 ATSR)

20 nm

20 @ 0.5 % albedo

1610 nm

300 nm

20 @ 0.5 % albedo

3.70 µm

3.55-3.85 µm

0.08 K @ 270 K

10.85 µm

10.35-11.35 µm

0.05 K @ 270 K

12.00 µm

11.50-12.50 µm

0.05 K @ 270 K